I am using the NI PXI 7340 and the UMI 7764 and want to connect my 3rd party driver and a stepper motor with Opto-coupler 6N137 which need at least 100mA current for that i want to connect a 47 ohm in series with anode of 6N137 to GND.
I want to know how much current7340 can drive at the STEP out and DIR ports from the UMI 7764 are connected to my 3rd party driver.
In 7340 user manual given specification are
Stepper outputs
Maximum pulse rate ........................4 MHz (full, half, and microstep)
Minimum pulse width......................120 ns at 4 MHz
Step output mode.............................Step and direction or CW/CCW
Voltage range.................................. 0 to 5 V
Output low voltage .................. <0.6 V at 64 mA sink
Output high voltage .................Open collector with built-in
3.3 kΩ pull-up to +5 V
